JPS6041276B2 - Method and device for terminal treatment of lined pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for treating the lining material at the end of the pipe in a pipe lined by pasting a lining material on the inner surface,
The present invention relates to a method and apparatus for maintaining attachment to a conduit.

For pipes buried underground, such as underground pipes such as secondary pipes, gas pipes, water pipes, communication lines, and power lines, the inner surface of the pipes is repaired for the purpose of repairing aging parts or reinforcing against earthquakes and ground movements. Lining materials are pasted on the walls. In this case, the pipe is divided into lengths of about several hundred torr and lined at once, but since the length is finite, there are always ends at the lined portions.
However, in this terminal, the lining material may peel off from the inner surface of the tube, and once this peels off, the peeled part rapidly spreads, causing the lining material to collapse diametrically due to its own weight, blocking the flow path. Sometimes it happens. Furthermore, if the pipe line is damaged at the peeled part, fluid may leak or underground water may enter from there, and the effectiveness of the lining may be lost. SUMMARY OF THE INVENTION Accordingly, the present invention provides a method and apparatus for effectively securing the ends of the lining to the pipe in a lined conduit and preventing the lining from peeling away from the ends.

Referring to the drawings below, reference numeral 1 denotes a conduit, and a lining material 2 is pasted on the inner surface of the conduit.

Reference numeral 3 denotes a protective ring, which is iron-fitted to the outer periphery of the end of the conduit 1, and connects flanges 4, 4' with bolts 5, 5' and nuts 6.
, 6', the pipe 1 is tightened from the outside.

Reference numeral 7 denotes a metal expansion ring having an outer diameter smaller than the inner diameter of the lining material 2, and is iron-fitted into the lining village 2 from one end of the pipe line 1.

8 is the device of the present invention.

9 is a pressure reducing cylinder, which includes an outer segment 10 and a piston 11.
A support ring 12 is screwed onto the tip of the outer cylinder 10.

The support ring 12 consists of a base 13 and a fan-shaped part 14 projecting forward from the base 13. Between each corner part 14, the lower end of an arm 15 is rotatably supported by a machine screw 16. There is. Reference numeral 17 denotes a transverse pressure member, which has a shape in which a substantially cylindrical body whose inner surface exhibits a tapered surface is divided into a plurality of parts along a plane passing through its central axis.

Each pressure expanding member 17 has a through hole 18 having a rectangular cross section in its center, and the other end of the arm 15 is inserted into the through hole 18 and is supported swingably by a machine screw 19. There is. The pressure expanding members 17 are arranged in an annular shape, and annular springs 22 and 23 are fitted into grooves 20 and 21 formed on the outer periphery of both ends of the pressure expanding members 17 to tighten them together. Reference numeral 24 denotes a tapered conical pressing portion provided at the tip of the piston 11, and the tip thereof is inserted into the center of the annularly arranged pressure expanding member 17.

Next, the method of the present invention will be described. First, a protective ring is fitted around the outer periphery of the end of the lined pipe 1, and this is tightened.

Next, insert the expansion ring 7 into the lining material 2 of the conduit 1,
This is pupiled inward of the protective ring 3. Next, with the piston 11 of the hydraulic cylinder 9 of the device 8 retracted, the side pressure member 17 is fitted into the expansion ring 7.

When the cylinder 9 is operated in this state and the piston 11 is moved forward, the pressing member 24 is inserted into the pressure member 17, and the conical surface of the weighing pressure section 24 and the tapered surface of the gunwale section 17 are connected. Due to the action, the pressure expanding part village 17 is caused by the annular spring 22
, 23 and are pushed and expanded. As a result, the outer circumferential surface of the side pressure member 17 expands the expansion ring 7 and plastically deforms it, thereby firmly holding the lining village 2 between the expansion ring 7 and the pipe line 1. When expanding the expansion ring 7, there is a risk that the conduit 1 will be damaged by the force, but according to the present invention, the protection ring 3 prevents the conduit 1 from being damaged. or,
By iron-coupling a packing made of an elastic material such as rubber or soft plastic between the expansion ring 7 and the lining village 2, damage to the lining material 2 is prevented and the lining material 2 is held more firmly. be able to. Further, the same effect can be obtained by forming a convex shape in the circumferential direction on the outer periphery of the expansion ring 7. As described above, in the method of the present invention, a protective ring is attached to the outer periphery of the end of the conduit, and an expansion ring is fitted into the lining material and expanded, thereby creating a gap between the expansion ring and the conduit. Since the lining material is held between the pipes, the lining material is firmly fixed at the end portion thereof and will not peel off from the end portion.

Further, since the reinforcing ring is used, the pipe line will not be damaged by expanding the expansion ring, and the pipe can be terminally processed safely and firmly. Furthermore, since the device of the present invention uses a hydraulic cylinder and converts the force in the direction of expansion across the taper, it can generate a powerful force sufficient to plastically deform the metal expansion ring.

In addition, since each expansion member is converged into a cylindrical shape by an annular elastic member such as an annular spring, each expansion member does not separate into pieces even in inconvenient times, and can be easily expanded during use. They can join together in the ring. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a central vertical sectional view showing one embodiment of the present invention, and FIGS. 2 and 3 are lines 0 and 10 in FIG.
- It is a cross-sectional view cut along the m line.

1... Pipe line, 2... Lining material, 3...
...Protection ring, 7...Expansion ring, 9...
・Hydraulic cylinder, 10...outer cylinder, 11...piston, 1
5... Arm, 17... Expansion section village, 22,
23... Annular spring, 24... Pressing member.

Lots/Sardines *Eo A meeting illusion

Claims (1)

[Scope of Claims] 1. A protective ring is fitted to the outer periphery of the end of the lined pipe, the pipe is tightened from the outside by the protective ring, and the inside of the lining material is inserted into the lining material at the end of the pipe. The lining material is clamped and fixed between the expansion ring and the pipe main body by fitting a metal expansion ring having an outer diameter slightly smaller than the diameter of the pipe and expanding the pressure in the diameter direction of the expansion ring. A method for terminal treatment of lined pipes. 2. The method for treating the end of a lined pipe according to claim 1, wherein the expansion ring has a convex shape formed in the circumferential direction on its outer peripheral surface. 3. The method for treating the end of a lined pipe according to claim 1, characterized in that a packing made of an elastic material such as rubber is fitted between the expansion ring and the lining material. 4 A plurality of arms are rotatably supported in an annular manner on the outer cylinder of the hydraulic cylinder, and each arm has a substantially cylindrical body having a tapered inner surface at the tip thereof, with a plane passing through its central axis. A plurality of divided pressure expansion members are swingably supported, and these pressure expansion members are converged into a cylindrical shape by an annular elastic member, and a tapered substantially conical or conical shape is attached to the tip of the piston of the cylinder. An inner lining characterized in that a table-shaped pressing member is provided, and when the pressing member is inserted between the pressure expanding members, the pressure expanding member is expanded against the elasticity of the annular elastic member. terminal treatment equipment for pipes.